104 



■28. AMBROSIACE^. 



ceding, but the leaves are stiff, often undivided, dark-green, 

 more prickly on the edges and clasping the stem with 

 rounded auricles; akenes brown, oboval, winged, and smooth 

 except for 3 longitudinal ribs. 



Gullies, cultivated land and near sea. — Aug. -Jan.— 

 Almost cosmopolitan. 



Var. rtttoialis. Black. A coarse maritime variety; 

 leaves leathery, oblong, pinnatifid, with rounded lobes and 

 wavy, prickly edges; involucre nearly twice as large as in 

 the typical form, 18-20 mm. (about ^ in.) long; akenes 

 large, orange or brown, broadly winged. 



Sea-coast from Port Adelaide to Cape Northumberland. 

 — All the year. — Possibly indigenous. 



34. Crepis, L. 



Involucre of 2 rows of equal 

 several shorter outer bracts at 

 base ; flowers all ligulate ; 

 akenes cylindrical, somewhat 

 narrowed at summit, with a 

 copiou.s pappus of simple hairs; 

 receptacle naked. 



1. Crepis vlrenSp L. Green 

 Crepis. Annual, with an erect, 

 striate stem, glabrous or downy 

 below, and glandular above; 

 leaves Hat, the radical ones 

 stalked, oblong, pinnatifid, stem- 

 leaves lanceolate, Avith narrow 

 teeth or lobes and acute, clasp- 

 ing auricles; heads rather small, 

 on long peduncles, forming a 

 loose, corymbose panicle ; invo- 

 lucre conical after flowering, 

 bracts linear, glandular-hairy, 

 the outer ones very narrow ; 

 akenes golden, 10-ribbod, very 

 small, shorter than the white- 

 silky pappus; flowers yellow. 



Mount Gambler. — Dec. -Feb. — 

 Europe. 



inner bracts. 



w 



ith 



Crepis virens. 



Family 28.- AMBROSIACEi«. 



Flowers monoecious, the males in globular, deciduous 

 lieads, surrounded by an involucre; the females 1 or 2 

 enclosed in a spiny involucre ; no calyx ; corolla 

 tubular with 5 equal teeth in the male flowers, in 

 the females none: stamens 5, with free anthers; 



